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public class Pair<T>
...{
public Pair() ...{ first = null; second = null; }
public Pair(T first, T second) ...{ this.first = first; this.second = second; }
public T getFirst() ...{ return first; }
public T getSecond() ...{ return second; }
public void setFirst(T newValue) ...{ first = newValue; }
public void setSecond(T newValue) ...{ second = newValue; }
private T first;
private T second;
}
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import java.util.*;
public class stack
{
private List list=new ArrayList();
private int index=0;
public void push(Object obj)
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import java.io.*;
import java.io.BufferedInputStream;
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===================================TimerTask=======================================
import java.util.TimerTask;
import java.util.Calendar;
public class MyTask extends TimerTask
{
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